Here are some tips from Norcross to keep your New Year's goals. And remember, it's a marathon, not a sprint!

1) Make changes to your behavior. Changing your routine can bring different results. Instead of trying the same thing over and over again, expecting a different outcome, people need to modify their behaviors.

2) Define SMART goals. When setting targets, use the SMART acronym: specific, measurable, attainable, relevant and time-specific. Norcross says that individuals must go further than simply saying, "I want to lose weight." "Specifically, what are you going to do so that you can measure and track [your weight] over time, for say, the next three to four months?" he said.

3) Track your progress. Norcross calls this technique self-monitoring. A calendar, or a calendar app, is a handy tool you can use to track your goals. "It also can show you what the triggers of your behavior are and it can alert you to any early slips," Norcross says.

4) Reward small achievements. When you reach a portion of your goal, as an example you lose 10 of those 25 pounds, be kind to yourself. Recognize the accomplishment and perhaps do something nice for yourself. This will help keep you focused and excited about the overall goal.

5) Make it public. When individuals announce their goals on social media, to their families or in the workplace, they are being held accountable by those closest to them. The upside to this, Norcross says, is it can keep you on track. The downside: "It potentially increases embarrassment if they fail," he said. So, it depends on how open you want to be about your resolutions.

6) You are human. Chances are you may slip up once or twice during this process. It's OK. Norcross says it is important to deal with failures by getting back on track and continuing along your journey. Seventy percent of successful goal-setters said that their first slip actually strengthened their resolutions. Norcross says to adopt the outlook, "I'm human. Let me learn from it, and let me keep going."